Aussie mum faces 12 years jail over sons' deaths

Allyson McConnell (r) with her Canadian husband Curtis and their two sons, two-year-old Connor and 10-month-old Jayden.

AAP: supplied

Australian-born woman Allyson McConnell has faced a sentencing hearing for the killing of her two children in Canada.

The judge will decide next month on the crown's request for a 12-year prison term.

At most McConnell would serve nine years in prison, which includes credit for time already spent in custody.

Her lawyer has asked for double credit for time served and McConnell has already been given notice of deportation, with the Australian High Commission supporting her return to Australia.

McConnell had originally been charged with second degree murder, but last month was convicted of manslaughter in the drowning deaths of her two boys, one of whom was aged two-and-half years, and the other 10 months.

McConnell says she has no memory of the deaths.

The judge had ruled there was a reasonable doubt as to her frame of mind, adding McConnell has since been tormented by the deaths.

In an impact statement, the boys' grandmother Audrey McConnell says she still has nightmares of the two children in their coffin.